Circular saw



FIG. 1 is a top perspective view of the circular saw.

FIG. 2 is a side perspective view of the circular saw.

FIG. 3 is a side view of the circular saw.

FIG. 4 is a bottom view of the circular saw.

FIG. 5 is a front view of the circular saw.

FIG. 6 is a top view of the circular saw.

FIG. 7 is an opposite side view of the circular saw; and,

FIG. 8 is a rear view of the circular saw. 

I claim the ornamental design for a circular saw, substantially as shown. 